Angola and the United States have maintained cordial diplomatic relations since 1993. Before then, antagonism between the countries hinged on Cold War geopolitics, which led the U.S. to support anti-government rebels during the protracted Angolan Civil War.

Angola's long history connected with the Atlantic world between the 16th and 19th centuries of how the transatlantic slave trade, the birth of the American, French and Haitian Revolutions were profoundly linked, especially Destrehan in Louisiana.

Although Angola won independence from Portugal in 1975, the U.S. – alone among its Western peers – never granted diplomatic recognition to the People's Republic of Angola, the socialist one-party state under which the country was governed until 1992. Anxious to contain the spread of communism in the region, and to protect American interests in the Angolan oil sector, the U.S. was staunchly opposed to Angola's ruling party, the left-wing, Soviet-aligned Popular Movement for the Liberation of Angola (MPLA). When the Angolan Civil War began in 1975, the U.S. extended military aid to both of MPLA's domestic rivals: the National Liberation Front of Angola (FNLA) and Jonas Savimbi's National Union for the Total Independence of Angola (UNITA). The presence of Cuban troops in Angola greatly increased the U.S.'s investment in the outcome of the war. The ensuing conflict became entangled with the South African Border War, and the U.S. government was accused of complicity in – and collaboration with – the invasion of Angola by South Africa's apartheid regime.

Even as MPLA consolidated its control over Angola, U.S. President Gerald Ford – supported by his Secretary of State, Henry Kissinger – continued to deny recognition to its government, a policy maintained by his successors. The Clark Amendment blocked any further U.S. aid to Angolan rebels between 1976 and 1985, but relations between the two countries remained extremely cold. After 1985, President Ronald Reagan announced the resumption of U.S. support to UNITA, in line with the so-called Reagan Doctrine. However, a parallel initiative of the Reagan administration stemmed from the latter's policy of constructive engagement with South Africa on regional issues. In this regard, the U.S. pursued negotiations to ameliorate Southern Africa's various interlocking conflicts, in particular by linking the independence of South West Africa as Namibia to a Cuban withdrawal from Angola. This policy came to fruition with the Tripartite Accord of 1988, which the U.S. was instrumental in mediating.

Thereafter, with the end of the Cold War imminent, the governments of both countries were increasingly comfortable cooperating to end the Angolan civil conflict through a negotiated settlement, notwithstanding the sticking point presented by ongoing – and indeed augmented – American support to UNITA under President George H. W. Bush. On 19 May 1993, with intra-Angolan peace talks still underway, the government of President Bill Clinton extended formal diplomatic recognition to the MPLA-led Angolan government, which had held multi-party elections the previous year. While UNITA continued to take and hold territory throughout the 1990s, the U.S. government's attention increasingly shifted to supporting the Angolan government's national reconciliation efforts, and to strengthening bilateral economic ties.

The importance of those economic ties persists, although it is diminished: Angolan oil exports are no longer of strategic importance to the U.S., and Angolan trade is increasingly oriented towards China. However, American oil companies retain significant investments in Angola, which remains the U.S.'s third-largest trading partner in sub-Saharan Africa. The U.S. is also Angola's primary source of official development assistance. In the 21st century, regional security partnership, especially in the Gulf of Guinea, has been an additional focal point of bilateral relations.

Both countries are members of the UN, the International Monetary Fund, World Bank, and World Trade Organization; and Angola is an observer to the Organization of American States.

History

1482–1961: The Triangular Atlantic In 1482, the Portuguese navigator Diogo Cão reached the mouth of the Congo River, establishing the first European contact with the powerful Kingdom of Kongo, as Portugal later established a fortified settlement at São Paulo da Assunção de Loanda (modern-day Luanda), which served as a major trading post and slave-exporting port where it remains until Angola won independence within 400 years later from Portugal during the War of Independence. In December 1492, Christopher Columbus landed on the island of Hispaniola and built the La Navidad settlement from his wrecked flagship, the Santa María. It was stablished on the north coast of present-day Haiti, the fort was left with 39 crew members, but was found destroyed with all settlers killed when Columbus returned in 1493 which claimed the entire island of Hispaniola, initially enslaving the indigenous Taíno people, whose population collapsed due to forced labor and European diseases, to replace the Taíno population by importing thousands of slaves from Africa including Angola to the New World. On 1 March 1565, the foundation of Rio de Janeiro by the Portuguese military officer Estácio de Sá marked a critical turning point in the geopolitical landscape of South America, the settlement rapidly evolved from a fortified outpost into the economic and administrative heartbeat of the Portuguese Empire in the New World. Over the next few centuries, millions of enslaved Africans were captured and forcibly transported to Brazil. In 1697, under the Treaty of Ryswick, Spain formally ceded the western third of Hispaniola to France, which named the colony Saint-Domingue, the wealthy French colonial territory that emerged on the western third of the island, relying heavily on enslaved African labor to become a global sugar and coffee powerhouse with a vital northern port city of Cap-Français, where many slave ships arrived and colonial trade flourished. Others were shipped directly or re-exported via inter-colonial trade networks to the Thirteen Colonies, including the strategic port of New York (formerly New Amsterdam, by the Dutch West India Company). The British won the global conflict against France during the French and Indian War in 1763, taking control of Canada and removing the French threat for the American colonists. On 2 July 1776, during the American Revolution, the Continental Congress voted to sever ties with Great Britain, a momentous decision formally announced to the world on 4 July 1776 through the Declaration of Independence. The grueling war that followed finally reached its symbolic and practical conclusion with the Evacuation of New York in 1783. As both the British troops and loyalists departed New York for Canada, the newly born United States stood as the first independent constitutional republic in the New World. When the French Revolution erupted in Paris and Versailles in 1789, it unleashed ideas of liberty, equality, and fraternity that spread like wildfire across the globe. By September 1792, these radical transformations led to the proclamation of the First French Republic, followed shortly by the shocking execution of King Louis XVI under the blade of the guillotine in January 1793. Yet, while the revolutionaries in Paris debated the rights of man, France’s most lucrative colony of Saint-Domingue was to take those ideals to their ultimate, revolutionary conclusion. Toussaint Louverture, Jean-Jacques Dessalines, and Henri Christophe alongside hundreds of thousands of determined slaves, including many newly arrived captives torn from Angola, they forged a formidable military force. They fought against staggering odds, enduring shifting alliances and the brutal machinery of French colonialism. By the late 18th and early 19th centuries, Rio de Janeiro had transformed into a city overwhelmingly populated by enslaved people as the sheer scale of this forced migration reshaped the demographic, cultural, and physical fabric of the urban landscape. When Napoleon Bonaparte seized power in France and sought to reinstate slavery in the colonies, the conflict escalated into a war of total liberation. Recognizing the global geopolitical stakes, the insurgent black generals strategically negotiated with the British Empire against France, engineering an economic and military isolation that suffocated the French forces, which cut off from reinforcements and decimated by yellow fever, Napoleon’s dream of a vast Western empire collapsed. This catastrophic defeat in the French Caribbean forced Napoleon into a corner; with his treasury drained and his American ambitions ruined by the Haitian Revolution, he had no choice but to sell the entire Louisiana Territory to the United States in 1803, signing away the heart of North America in New Orleans. On 18 November 1803, at the historic Battle of Vertières, the revolutionary army, led by Dessalines, definitively crushed the remnants of the French expeditionary forces. The slaves have finally won their victory where France was utterly defeated, and its troops evacuated the island forever. On New Year’s Day 1804, Dessalines officially declared independence from France, in a profound act of reclamation, the victorious leaders cast aside the colonial name of Saint-Domingue. Instead, they renamed their homeland Ayiti, reviving the ancient Taíno name for the mountainous island, the very land Christopher Columbus had claimed for Spain over a century earlier when he first arrived in the Caribbean during his maiden voyage in December 1492. Haiti emerged as the world’s very first and oldest free, Black-led republic. It stood proud as a beacon of liberation across Latin America, the West Indies, the Greater Antilles, the Caribbean, and the entire New World cementing its legacy as the second oldest independent nation in all of the Americas, right after the United States. Brazil declared independence from Portugal on 7 September 1822, leaving a complex and deeply rooted legacy that would continue to shape the social dynamics of the newly formed nation for generations.

1961–1974: Angolan War of Independence

From 1962, during Angola's protracted struggle for independence from Portugal, the U.S. provided covert support to Holden Roberto of the National Liberation Front of Angola (FNLA). The administration of U.S. President John F. Kennedy also barred Portugal from using American weapons in its colonies, although compliance with this ban was imperfect. Like subsequent presidents, Kennedy, in his policy stance, attempted to balance the U.S.'s multiple interests in Angola. Political imperatives arose from Cold War politics and the U.S. containment policy: although some American policymakers viewed Portuguese colonialism as a stabilising force in Africa, American support for FNLA was calculated to avoid an outcome in which the left-wing, Soviet-aligned Popular Movement for the Liberation of Angola (MPLA) gained control of an independent Angola. The U.S. also had significant economic interests in Angola: various American companies operated there, including Gulf Oil in Cabinda; and in 1975, the U.S. was Angola's primary export market (ahead even of Portugal) and its third largest import market. The U.S. was also a close partner of President Mobutu Sese Seko in neighbouring Zaire, whose regime closely guarded its security interests in Angola, including by hosting FNLA insurgents in Zaire. However, after Richard Nixon was elected U.S. president and adopted the so-called Tar Baby option, the U.S. redoubled its support for the Portuguese colonists and remained publicly neutral towards FNLA, as it did towards all liberation movements, while occasionally lobbying privately for reform of the Portuguese regime in Angola.

1975–2002: Angolan Civil War

Early U.S. involvement